Red Sox LHP prospect Brandon Clarke ‘unlikely to pitch again this year’ due to recurrence of blisters

Red Sox pitching prospect Brandon Clarke was placed on High-A Greenville’s 7-day injured list on Friday due to a recurrence of blisters and is unlikely to pitch again this year as a result, according to The Boston Globe’s Alex Speier.

Clarke is currently regarded by Baseball America as Boston’s No. 7 prospect, which ranks fourth among pitchers in the organization. The 22-year-old left-hander was selected in the fifth round (148th overall) of last summer’s draft out of State College of Florida, Manatee-Sarasota. He forwent his commitment to transfer to South Carolina by signing with the Red Sox for an under-slot $400,000, but did not make his professional debut until April.

On the heels of an impressive spring training, Clarke broke camp with Low-A Salem and dominated Carolina League hitters to the tune of a 0.93 ERA (0.94 FIP) with 17 strikeouts to two walks in three starts (9 2/3 innings) to open the season. He received a promotion to Greenville in late April and produced solid results through the end of May, resulting in his vaulting into the back end of Baseball America’s Top 100 prospects list. After tossing 4 1/3 scoreless frames against Bowling Green on May 24, however, he missed the next month-plus due to a blister caused by a hangnail.

Upon returning to the mound on June 26, Clarke struggled to a 7.71 ERA (5.42 FIP) in seven starts (14 innings) before being placed on Greenville’s injured list. Overall, he has posted a 5.08 ERA (4.20 FIP) with 43 strikeouts to 25 walks across 11 outings (28 1/3 innings) for the Drive. Opposing South Atlantic League hitters have batted .150 against him.

If Clarke is indeed done for the year, he will wrap up his first pro season having forged a 4.03 ERA (3.37 FIP) with 60 strikeouts to 27 walks in 14 starts (38 innings) between Salem and Greenville. That translates to a 34.5 percent strikeout rate, a 15.5 percent walk rate for the 6-foot-4, 220-pound southpaw, who regularly reached 98-99 mph with his upper-90s fastball while incorporating an 87-90 mph slider, 81-85 mph sweeper, and an 87-89 mph changeup into his arsenal.